Realtime Compositor: Add basic convert and vector nodes

This patch implements the following nodes for the realtime compositor:

- Map range node.
- Map value node.
- Math node.
- Normal node.
- Alpha convert node.
- Separate color node.
- Combine color node.
- Separate XYZ node.
- Combine XYZ node.
- Separate RGBA node.
- Combine RGBA node.
- Separate HSVA node.
- Combine HSVA node.
- Separate YCCA node.
- Combine YUVA node.
- Set alpha node.
- Switch node.
- Switch view node.
- RGB to BW node.
- Color ramp node.

Differential Revision: https://developer.blender.org/D15229

Reviewed By: Clement Foucault

1 files changed, 43 insertions, 2 deletions

diff --git a/source/blender/nodes/composite/nodes/node_composite_setalpha.cc b/source/blender/nodes/composite/nodes/node_composite_setalpha.cc
index 8aeaafbbf67..9930125aa70 100644
--- a/source/blender/nodes/composite/nodes/node_composite_setalpha.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_setalpha.cc
@@ -8,6 +8,10 @@
 #include "UI_interface.h"
 #include "UI_resources.h"
 
+#include "GPU_material.h"
+
+#include "COM_shader_node.hh"
+
 #include "node_composite_util.hh"
 
 /* **************** SET ALPHA ******************** */
@@ -16,8 +20,14 @@ namespace blender::nodes::node_composite_setalpha_cc {
 
 static void cmp_node_setalpha_declare(NodeDeclarationBuilder &b)
 {
-  b.add_input<decl::Color>(N_("Image")).default_value({1.0f, 1.0f, 1.0f, 1.0f});
-  b.add_input<decl::Float>(N_("Alpha")).default_value(1.0f).min(0.0f).max(1.0f);
+  b.add_input<decl::Color>(N_("Image"))
+      .default_value({1.0f, 1.0f, 1.0f, 1.0f})
+      .compositor_domain_priority(0);
+  b.add_input<decl::Float>(N_("Alpha"))
+      .default_value(1.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .compositor_domain_priority(1);
   b.add_output<decl::Color>(N_("Image"));
 }
 
@@ -33,6 +43,36 @@ static void node_composit_buts_set_alpha(uiLayout *layout, bContext *UNUSED(C),
   uiItemR(layout, ptr, "mode", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
 }
 
+using namespace blender::realtime_compositor;
+
+class SetAlphaShaderNode : public ShaderNode {
+ public:
+  using ShaderNode::ShaderNode;
+
+  void compile(GPUMaterial *material) override
+  {
+    GPUNodeStack *inputs = get_inputs_array();
+    GPUNodeStack *outputs = get_outputs_array();
+
+    if (get_node_set_alpha()->mode == CMP_NODE_SETALPHA_MODE_APPLY) {
+      GPU_stack_link(material, &bnode(), "node_composite_set_alpha_apply", inputs, outputs);
+      return;
+    }
+
+    GPU_stack_link(material, &bnode(), "node_composite_set_alpha_replace", inputs, outputs);
+  }
+
+  NodeSetAlpha *get_node_set_alpha()
+  {
+    return static_cast<NodeSetAlpha *>(bnode().storage);
+  }
+};
+
+static ShaderNode *get_compositor_shader_node(DNode node)
+{
+  return new SetAlphaShaderNode(node);
+}
+
 }  // namespace blender::nodes::node_composite_setalpha_cc
 
 void register_node_type_cmp_setalpha()
@@ -47,6 +87,7 @@ void register_node_type_cmp_setalpha()
   node_type_init(&ntype, file_ns::node_composit_init_setalpha);
   node_type_storage(
       &ntype, "NodeSetAlpha", node_free_standard_storage, node_copy_standard_storage);
+  ntype.get_compositor_shader_node = file_ns::get_compositor_shader_node;
 
   nodeRegisterType(&ntype);
 }